What kind of gas dust can be removed by bag type dust
collector? Sharpening dust, explosive dust, high temperature and high humidity gas dust, corrosive gas dust, INDRO
filtration introduces you more information as followings:
Sharpening dust
When dealing with sharpening dust
such as alumina, silica and sinter, the coarse particles in the dust and the
high velocity of air flow in the bag filter cause strong wear and tear on the
bag and shell of the filter. Therefore, measures should be taken to reduce the
absolute quantity of coarse dust and the velocity of dust-containing gas, such
as setting up pre-dust removal device before flue gas enters the bag filter,
strictly controlling the inlet velocity of filter bag and adding wear-resistant
materials at the easy-wearing place of air inlet.
Explosive dust
Explosive dust explodes needs to be
with the following three conditions at the same time:
1. Flammable substances exist in
flue gas at suitable concentrations.
2. There is sufficient oxygen and
oxidant.
3. There is a source of fire.
Therefore, when purifying such gases, measures should be taken to destroy
the above three conditions or the occurrence of certain conditions. Simply
speaking, it is to control the ingredients, extinguish fire seeds; eliminating
static electricity, grounding equipment; monitor explosion-proof, fire-fighting
and explosion-releasing.
High
temperature and high humidity gas dust
The flue gases of various industrial kilns and dryers belong to high
temperature flue gases, and most of them contain a lot of water and sulfur
oxides. Dust bag can deal with the flue gas below 300 ℃ at present. If the
temperature exceeds this, the flue gas should be pre-cooled. In special cases,
the high temperature flue gas between 450-550℃ can be directly
treated with metal fiber filter material. It is becoming more and
more common to treat the flue gas of steam boiler, cement kiln, metallurgical
kiln, incinerator and other high temperature kilns with bag filter at home and
abroad. Although the bag filter is limited by its filter material's temperature
resistance, it can deal with the high temperature flue gas whose temperature is
as high as 1200 ~ 1400℃ by proper treatment of the flue
gas of the system.
Corrosive gas
dust
In the flue gas purification system, there are mainly two kinds of media,
gas and dust, which have corrosive effect on the dust bag, such as sulfuric
acid gas formed by the presence of sulfur molecules in coal and heavy oil
fuels, or salt dust produced by water. Since the corrosion phenomenon in flue
gas purification occurs when the temperature of flue gas is below the acid dew
point, it is necessary to ensure that the flue gas of the system runs above the
dew point temperature. In the selection of filter media, according to the
characteristics of corrosive substances produced by flue gas, the corresponding
filter media should be adopted. For the purification system with serious corrosion
and high requirements, such as pharmaceutical, food, carbon black production,
the important parts of dust bag should be made of stainless steel or coated
with anticorrosive coating.
Shanghai Indro Industry Co., Ltd is one professional industrial filter bags manufacturer,
we make filter bags to
collector all kinds of above gas dust.
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